diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2017-09-22 12:06:09 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:28:33 +0800 |
| commit | 9d8b2c4dd23f14c47c90dde56f7d370d91f8fb71 (patch) | |
| tree | 16879ccd759ac5bb1229bca31c8f7ab53e72ef27 /drivers/thermal | |
| parent | 42b1fa466fb7579ba5ce9b4d71244538ab2f7354 (diff) | |
MLK-16526-1 thermal: imx_sc: add buffer for passive cooling mechanism
On i.MX8QM/8QXP, When temperature exceeds passive point,
the cooling mechanism will be trigger and temperature
will begin to drop, to avoid back and forth surrounding
the passive point, here adds 10 C buffer for passive point,
that means when cooling mechanism is trigger, only after
the temperature drop to 10 C below the passive point,
the cooling mechanism will exit.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Bai Ping <ping.bai@nxp.com>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/imx_sc_thermal.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/thermal/imx_sc_thermal.c b/drivers/thermal/imx_sc_thermal.c index 8503c38a4507..eb4c535b9fc5 100644 --- a/drivers/thermal/imx_sc_thermal.c +++ b/drivers/thermal/imx_sc_thermal.c @@ -20,6 +20,8 @@ #include "thermal_core.h" +#define IMX_SC_TEMP_PASSIVE_COOL_DELTA 10000 + struct imx_sc_sensor { struct thermal_zone_device *tzd; struct thermal_cooling_device *cdev; @@ -91,7 +93,8 @@ static int imx_sc_tsens_get_trend(void *p, int trip, enum thermal_trend *trend) trip_temp = (trip == IMX_TRIP_PASSIVE) ? sensor->temp_passive : sensor->temp_critical; - if (sensor->tzd->temperature >= trip_temp) + if (sensor->tzd->temperature >= + (trip_temp - IMX_SC_TEMP_PASSIVE_COOL_DELTA)) *trend = THERMAL_TREND_RAISE_FULL; else *trend = THERMAL_TREND_DROP_FULL; |